Ferrofluidic seal
Mechanical seal which uses magnetic liquid / From Wikipedia, the free encyclopedia
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Ferrofluidic seals, or magnetic liquid rotary seals, are used in rotating equipment to enable rotary motion while maintaining a hermetic seal using a physical barrier in the form of a ferrofluid. The ferrofluid is suspended in place by the use of a permanent magnet. Since their development in the 1970s, the seals have seen use in specialized applications such as computer disc drives, vacuum, and nuclear systems. [1]
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